PEAK on fertility monitor but bf hungover...

I am very excited to see Peak this morning on my clearblue fertility monitor after six days of reading High. Annoyingly, my boyfriend is hungover this morning but I've said well, I need you today and he's said yes tonight then when I'm recovered. But whilst this should still capture an egg ( I'm presuming if I've realised one!) I am now wondering if his alcohol in his system will have made his sperm useless? Am I crazy? I'm hoping it won't make a difference, I swear I read at college (many years ago!)  that the life cycle of a sperm takes a while so the little guys today have been made a while ago. Does anyone know about alcohol and semen quality??! X